https://sourceware.org/bugzilla/show_bug.cgi?id=13078#c11 https://bugzilla.novell.com/show_bug.cgi?id=888166 To use virtio-serial device, unix socket created for chardev with default umask(022) has insufficient permissions. e.g.: -device virtio-serial \ -chardev socket,path=/tmp/foo,server,nowait,id=foo \ -device virtserialport,chardev=foo,name=org.fedoraproject.port.0 #ls -l /tmp/somefile.sock srwxr-xr-x 1 qemu qemu 0 21. Jul 14:19 /tmp/somefile.sock Other users in the same group (like real user, test engines, etc) cannot write to this socket. These patch series contains a qemu patch and a libvirt patch: qemu patch: adds a new 'umask' option to -chardev, so that user can change the umask. libvirt patch: pass 'umask=0x002' paramter to qemu command line for virtio-serial device Chunyan Liu (2): qemu side: add 'umask' option to chardev libvirt side: qemu: add umask(002) to virtio-serial chardev commandline -- 1.8.4.5 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list